Pls.. me with this i really need it.. pls. a gas in a cylinder expands from a volume of 0.110 m3 to 0.320 m3. heat flows into the gas just rapidly enough to keep the pressure constant at 1.65 x 105 pa during the expansion. the total heat added is 1.15 x 105 j. (a) find the work done by the gas. (b) find the change in internal energy of the gas. (c) does it matter whether the gas is ideal? why or why not?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2